iPhone 5 was more than a mere speed bump and a slight size increase. They also changed the aspect ratio to the one that the industry actually accepts as being the movie-watching one.
But, let's all take a look at two phones made by a different company. We have the Galaxy S 2 and Galaxy S 3.
-Increased screen size and resolution (.5 inches)
-Additional display support
-Better camera
-Better battery
-NFC
-Bluetooth 4.0
-Speed bump
-Lighter
-More RAM
Yep, those updates are all revolutionary. Everyone knows that the S series is going out there and innovating. As a phone, it didn't do much. Why? Because there really isn't much they can do on the hardware front anymore.
Like I said, if Apple dies and no one else innovates, Samsung isn't going to do anything to change their phone. Because they'll be thrilled of selling you that same old thing.
I'm not saying that only Apple is failing, I think they're still ahead of the competition. If it's just going to be speed bumps until 2025, then I think it's time to switch.